content: package com.aizuda.snailjob.server.starter.listener;
  
  import com.aizuda.snailjob.common.core.constant.SystemConstants;
  import com.aizuda.snailjob.common.core.util.SnailJobVersion;
  import com.aizuda.snailjob.common.log.SnailJobLog;
  import com.aizuda.snailjob.server.common.Lifecycle;
  import lombok.RequiredArgsConstructor;
  import lombok.extern.slf4j.Slf4j;
  import org.slf4j.helpers.MessageFormatter;
  import org.springframework.context.ApplicationListener;
  import org.springframework.context.event.ContextRefreshedEvent;
  import org.springframework.stereotype.Component;
  
  import java.util.List;
  
  /**
   * 系统启动监听器
   *
   * @author: opensnail
   * @date : 2021-11-19 19:00
   */
  @Component
  @RequiredArgsConstructor
  @Slf4j
  public class StartListener implements ApplicationListener<ContextRefreshedEvent> {
      private final List<Lifecycle> lifecycleList;
      private volatile boolean isStarted = false;
  
      @Override
      public void onApplicationEvent(ContextRefreshedEvent event) {
          if (isStarted) {
              SnailJobLog.LOCAL.info("snail-job server already started v{}", SnailJobVersion.getVersion());
              return;
          }
  
          System.out.println(MessageFormatter.format(SystemConstants.LOGO, SnailJobVersion.getVersion()).getMessage());
          SnailJobLog.LOCAL.info("snail-job server is preparing to start... v{}", SnailJobVersion.getVersion());
          lifecycleList.forEach(Lifecycle::start);
          SnailJobLog.LOCAL.info("snail-job server started successfully v{}", SnailJobVersion.getVersion());
          isStarted = true;
      }
  }
  